CN102070167A - Production method of monocrystalline aluminum hydroxide - Google Patents
Production method of monocrystalline aluminum hydroxide Download PDFInfo
- Publication number
- CN102070167A CN102070167A CN2010105876894A CN201010587689A CN102070167A CN 102070167 A CN102070167 A CN 102070167A CN 2010105876894 A CN2010105876894 A CN 2010105876894A CN 201010587689 A CN201010587689 A CN 201010587689A CN 102070167 A CN102070167 A CN 102070167A
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- CN
- China
- Prior art keywords
- product
- monocrystalline
- production method
- aluminium hydroxide
- aluminum oxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 239000013078 crystal Substances 0.000 claims abstract description 26
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 25
- 239000000047 product Substances 0.000 claims abstract description 24
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000005406 washing Methods 0.000 claims abstract description 14
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910001388 sodium aluminate Inorganic materials 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 10
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 claims abstract description 10
- 229940039790 sodium oxalate Drugs 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 3
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 28
- 239000012141 concentrate Substances 0.000 claims description 10
- 239000003513 alkali Substances 0.000 claims description 8
- 239000003518 caustics Substances 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 4
- 230000015556 catabolic process Effects 0.000 claims description 2
- 238000006731 degradation reaction Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 239000000945 filler Substances 0.000 abstract description 2
- 239000002243 precursor Substances 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 150000004645 aluminates Chemical class 0.000 abstract 1
- 239000008187 granular material Substances 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 210000000582 semen Anatomy 0.000 description 9
- 238000003756 stirring Methods 0.000 description 5
- 238000013019 agitation Methods 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 239000012065 filter cake Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
Abstract
The invention relates to a production method of monocrystalline aluminum hydroxide, in particular to a method for producing monocrystalline aluminum hydroxide by decomposing aluminate steel fine liquid in the production process of aluminum oxide. The method is characterized by comprising the following steps: (1) adding sodium oxalate into the sodium aluminate fine liquid to carry out decomposition reaction, filtering the decomposition product, and sufficiently washing the product with hot water to obtain seed crystals; and (2) adding the seed crystals obtained in the step (1) into the sodium aluminate fine liquid to carry out decomposition reaction, filtering the reaction product, and washing the product to obtain the monocrystalline aluminum hydroxide product. The monocrystalline aluminum hydroxide product prepared by the production method provided by the invention is transparent, has the characteristics of high hardness, uniform granularity, low oil absorption rate and the like, is micropowder filler with good properties, and can be used as the precursor of monocrystalline aluminum oxide granules; and the high chemical purity, granularity and physical and chemical properties of the monocrystalline aluminum hydroxide product can satisfy the production requirements of non-metallurgical level aluminum oxide, thus effectively lowering the production cost of non-metallurgical level aluminum oxide.
Description
Technical field
A kind of production method of monocrystalline type aluminium hydroxide relates to a kind of method that aluminic acid aluminium liquid decomposes manufacture order crystal formation aluminium hydroxide in the aluminum oxide production process that adopts.
Background technology
At present, kind surplus non-metallurgical-grade aluminum oxide kind has reached 300, non-metallurgical-grade aluminum oxide development is compared with the production metallurgy grade aluminum oxide rapidly, produce the required input of non-metallurgical-grade aluminum oxide and can't resemble price increase exponentially so, thereby the profit of product significantly increases.
All there is certain requirement in non-metallurgical-grade aluminum oxide market for product granularity or purity, and the presoma of product is extremely important for follow-up processing, not only has influence on the performance of product, and also can influence to some extent for the cost control of product.For example, make a-Al
2O
3The aluminum oxide that content is high must adopt low sodium A1 (OH)
3Or adopt suitable additive with Na
2O is reduced to bottom line, but tends to change high temperature Al because of the effect of additive
2O
3Application performance; Some product requirement size range needs coming into operation of pulverizing and stage equipment, and this is to need to increase cost.The monocrystalline aluminium hydroxide that the epigranular foreign matter content is low then can satisfy its requirement.Some mono-crystalline alumina grains material or signle crystal alumina porcelain also need monocrystalline aluminium hydroxide as raw material.
Obviously, provide a kind of and have very realistic meanings at chemical purity and the satisfactory product precursor of granularity.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, provides a kind of chemical purity, granularity and physical and chemical performance to satisfy non-metallurgical-grade aluminum oxide production requirement, reduces the production method of the monocrystalline type aluminium hydroxide of process for processing cost.
The objective of the invention is to be achieved through the following technical solutions.
A kind of production method of monocrystalline type aluminium hydroxide is characterized in that the step of its preparation process comprises:
(1) sodium aluminate concentrate solution is added sodium oxalate and carry out decomposition reaction, behind degradation production filtration, hot water thorough washing, make crystal seed;
(2) crystal seed that step made adds in the sodium aluminate concentrate solution and carries out decomposition reaction, and reaction product after filtration, washing makes monocrystalline aluminium hydroxide product.
The production method of a kind of monocrystalline type aluminium hydroxide of the present invention is characterized in that in the step (1) concentration of its sodium aluminate concentrate solution: caustic alkali Nk:130 ~ 170g/L, and aluminum oxide A:140 ~ 190g/L, the amount that adds sodium oxalate is 20 ~ 150 g/L.
The production method of a kind of monocrystalline type aluminium hydroxide of the present invention is characterized in that the temperature of decomposition reaction in the step (1) is 80 ~ 95 ℃, and the resolving time is 8 ~ 25h.
The production method of a kind of monocrystalline type aluminium hydroxide of the present invention, it is characterized in that in the step (2), caustic alkali Nk:130 ~ the 170g/L of its sodium aluminate concentrate solution, aluminum oxide A:140 ~ 190g/L, the amount that adds crystal seed is that crystal seed coefficient i:0.5 ~ 2.5(crystal seed coefficient i is the molecule ratio that aluminium hydroxide is amounted to into alumina content in aluminum oxide and the seminal fluid).
The production method of a kind of monocrystalline type aluminium hydroxide of the present invention is characterized in that the temperature of decomposition reaction in the step (2) is 80 ~ 95 ℃, and the resolving time is 20 ~ 35h.
The production method of a kind of monocrystalline type aluminium hydroxide of the present invention is characterized in that the temperature of decomposition reaction in the step (2) is 40 ~ 55 ℃, and the resolving time is 25 ~ 40h.
The production method of a kind of monocrystalline type aluminium hydroxide of the present invention, adding sodium oxalate in sodium aluminate concentrate solution decomposes at comparatively high temps, make crystal seed, again crystal seed is added sodium aluminate concentrate solution and under comparatively high temps (80 ~ 95 ℃) or lesser temps (40 ~ 55 ℃) condition, stir decomposition reaction, get monocrystalline aluminium hydroxide product, have transparent and hardness very big, epigranular, characteristics such as oil absorbency is low, it is a kind of well behaved micropowder filler, also can be used as the presoma of mono-crystalline alumina grains, its chemical purity, granularity and physical and chemical performance enough satisfy non-metallurgical-grade aluminum oxide production requirement, can effectively reduce non-metallurgical-grade aluminum oxide production cost.
Embodiment
A kind of production method of monocrystalline type aluminium hydroxide, its preparation process realize that by two steps it comprises crystal seed preparation and decomposition of crystal seed.The first step: seminal fluid (caustic alkali Nk:130 ~ 170g/L, aluminum oxide A:140 ~ 190g/L) adds sodium oxalate (add-on 20 ~ 150 g/L) at comparatively high temps (80 ~ 95 ℃) and carry out agitation condition under decomposition for some time (after 8 ~ 25h), filter and the hot water thorough washing, the gained filter cake is done down step decomposition crystal seed fully; Second step: the first step gained crystal seed (add-on crystal seed coefficient 0.5 ~ 2.5) is added seminal fluid under comparatively high temps (80 ~ 95 ℃) or lesser temps (40 ~ 55 ℃) condition, stir the decomposition reaction (time: comparatively high temps decomposition 20 ~ 35h, lesser temps decomposes 25 ~ 40h), and product carries out filtration washing and promptly gets monocrystalline aluminium hydroxide product.
Embodiment 1
Seminal fluid (caustic alkali Nk:150g/L, aluminum oxide A:170g/L) adds sodium oxalate at comparatively high temps (85 ℃) and after carrying out decomposing for 24 times under the agitation condition, filters and the hot water thorough washing, and the gained filter cake is done down step decomposition crystal seed fully; The first step is got crystal seed adding seminal fluid stir decomposition reaction under lesser temps (40 ~ 55 ℃) condition, product carries out filtration washing and promptly gets monocrystalline aluminium hydroxide product.
Table 1 test parameter of the present invention and result
Embodiment 2
Seminal fluid (caustic alkali Nk:130g/L, aluminum oxide A:145g/L) adds sodium oxalate at comparatively high temps (92 ℃) and after carrying out decomposing for 10 times under the agitation condition, filters and the hot water thorough washing, and the gained filter cake is done down step decomposition crystal seed fully; The first step is got crystal seed adding seminal fluid stir decomposition reaction under comparatively high temps (81 ~ 92 ℃) condition, product carries out filtration washing and promptly gets monocrystalline aluminium hydroxide product.
Table 2 test parameter of the present invention and result
Embodiment 3
Seminal fluid (caustic alkali Nk:170g/L, aluminum oxide A:189g/L) adds sodium oxalate at comparatively high temps (85 ℃) and after carrying out decomposing for 23 times under the agitation condition, filters and the hot water thorough washing, and the gained filter cake is done down step decomposition crystal seed fully; The first step is got crystal seed adding seminal fluid stir decomposition reaction under lesser temps (40 ~ 55 ℃) condition, product carries out filtration washing and promptly gets monocrystalline aluminium hydroxide product.
Table 3 test parameter of the present invention and result
Claims (6)
1. the production method of a monocrystalline type aluminium hydroxide is characterized in that the step of its preparation process comprises:
(1) sodium aluminate concentrate solution is added sodium oxalate and carry out decomposition reaction, behind degradation production filtration, hot water thorough washing, make crystal seed;
(2) crystal seed that step made adds in the sodium aluminate concentrate solution and carries out decomposition reaction, and reaction product after filtration, washing makes monocrystalline aluminium hydroxide product.
2. the production method of a kind of monocrystalline type aluminium hydroxide according to claim 1 is characterized in that in the step (1), the caustic alkali Nk:130 ~ 170g/L of its sodium aluminate concentrate solution, and aluminum oxide A:140 ~ 190g/L, the amount that adds sodium oxalate is 20 ~ 150 g/L.
3. the production method of a kind of monocrystalline type aluminium hydroxide according to claim 1 is characterized in that the temperature of decomposition reaction in the step (1) is 80 ~ 95 ℃, and the resolving time is 8 ~ 25h.
4. the production method of a kind of monocrystalline type aluminium hydroxide according to claim 1, it is characterized in that in the step (2), caustic alkali Nk:130 ~ the 170g/L of its sodium aluminate concentrate solution, aluminum oxide A:140 ~ 190g/L, the amount that adds crystal seed is crystal seed coefficient i:0.5 ~ 2.5.
5. the production method of a kind of monocrystalline type aluminium hydroxide according to claim 1 is characterized in that the temperature of decomposition reaction in the step (2) is 80 ~ 95 ℃, and the resolving time is 20 ~ 35h.
6. the production method of a kind of monocrystalline type aluminium hydroxide according to claim 1 is characterized in that the temperature of decomposition reaction in the step (2) is 40 ~ 55 ℃, and the resolving time is 25 ~ 40h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105876894A CN102070167B (en) | 2010-12-15 | 2010-12-15 | Production method of monocrystalline aluminum hydroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105876894A CN102070167B (en) | 2010-12-15 | 2010-12-15 | Production method of monocrystalline aluminum hydroxide |
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| Publication Number | Publication Date |
|---|---|
| CN102070167A true CN102070167A (en) | 2011-05-25 |
| CN102070167B CN102070167B (en) | 2012-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105876894A Active CN102070167B (en) | 2010-12-15 | 2010-12-15 | Production method of monocrystalline aluminum hydroxide |
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| Country | Link |
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| CN (1) | CN102070167B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110436496A (en) * | 2019-08-30 | 2019-11-12 | 贵州大学 | A method of Ultrafine High-purity Alumina is prepared using industrial sodium aluminate solution |
| CN111099645A (en) * | 2019-12-23 | 2020-05-05 | 山东泰星新材料股份有限公司 | Preparation method of flower-shaped aluminum hydroxide for pouring sealant |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5888461A (en) * | 1995-07-20 | 1999-03-30 | Aluminium Pechiney | Process for purifying sodium aluminate solutions containing sodium oxalate |
| CN1631786A (en) * | 2004-12-28 | 2005-06-29 | 中国铝业股份有限公司 | Process for producing sandy alumina by crystal seed decomposition |
| CN1974395A (en) * | 2005-06-23 | 2007-06-06 | 中国铝业股份有限公司 | Seed separation granularity controlling method in alumina producing Bayer process |
| WO2008116260A1 (en) * | 2007-03-27 | 2008-10-02 | Alcoa Of Australia Limited | Method for preparing aluminium oxide |
| CN100427396C (en) * | 2006-09-05 | 2008-10-22 | 中国铝业股份有限公司 | Production of aluminium oxide using Bayer method |
-
2010
- 2010-12-15 CN CN2010105876894A patent/CN102070167B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5888461A (en) * | 1995-07-20 | 1999-03-30 | Aluminium Pechiney | Process for purifying sodium aluminate solutions containing sodium oxalate |
| CN1631786A (en) * | 2004-12-28 | 2005-06-29 | 中国铝业股份有限公司 | Process for producing sandy alumina by crystal seed decomposition |
| CN1974395A (en) * | 2005-06-23 | 2007-06-06 | 中国铝业股份有限公司 | Seed separation granularity controlling method in alumina producing Bayer process |
| CN100427396C (en) * | 2006-09-05 | 2008-10-22 | 中国铝业股份有限公司 | Production of aluminium oxide using Bayer method |
| WO2008116260A1 (en) * | 2007-03-27 | 2008-10-02 | Alcoa Of Australia Limited | Method for preparing aluminium oxide |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110436496A (en) * | 2019-08-30 | 2019-11-12 | 贵州大学 | A method of Ultrafine High-purity Alumina is prepared using industrial sodium aluminate solution |
| CN111099645A (en) * | 2019-12-23 | 2020-05-05 | 山东泰星新材料股份有限公司 | Preparation method of flower-shaped aluminum hydroxide for pouring sealant |
| CN111099645B (en) * | 2019-12-23 | 2022-10-18 | 山东泰星新材料股份有限公司 | Preparation method of flower-shaped aluminum hydroxide for pouring sealant |
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| Publication number | Publication date |
|---|---|
| CN102070167B (en) | 2012-11-07 |
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